A survey was conducted of age in years of 50 randomly, Ask an Expert

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A survey was conducted of age in years of 50 randomly selected customers. The mean was 27.47 years with the standard deviation of 10.69 years.

About how large would the sample size have to be to cut margin of error by a factor of 4?

Round to the nearest integer.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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